chore(deps): bump docker/setup-buildx-action from 1 to 2 (#3101)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 1 to 2.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v1...v2)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/main-build.yml

@@ -54,7 +54,7 @@ jobs:
           registry: ghcr.io
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
 
       - name: Publish on GitHub Container Registry
         run: make publish-multiarch

.github/workflows/release-build.yml

@@ -60,7 +60,7 @@ jobs:
           VERSION: ${{ steps.get_version.outputs.VERSION }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
 
       - name: Publish KEDA images on GitHub Container Registry
         run: make publish-multiarch